从存储过程返回表类型的值也有二种:
1.存储过程使用浮标参数,即同时指定CURSOR VARYING OUTPUT项.调用者可以使用while及fetch循环遍历该浮标.
2.直接将存储过程返回的结果集插入到表中,即使用insert into 表名 exec 存储过程.此种方式中注意存储过程返回的结果集列与insert的列要完全对应,可以在insert中指定列名来保证对应关系.
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测试:
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----建立测试用的临时表
create table #tmp (colx int,coly int)
insert into #tmp values(1,2)
insert into #tmp values(2,3)
insert into #tmp values(3,4)
select * from #tmp
GO
----创建返回游标的存储过程
create proc sp_c @cur CURSOR VARYING OUTPUT
AS
begin
set @cur = CURSOR for select colx from #tmp
open @cur /*该过程返回游标,该游标为colx列的查询结果*/
end
GO
----创建返回表的存储过程
create proc sp_d
as
select coly from #tmp /*该过程返回coly列的查询结果*/
go
----创建用于调用以上二个存储过程的存储过程
create proc sp_e
as
begin
declare @x int
declare @cur cursor
----接收游标,并遍历游标
EXEC sp_c @cur OUTPUT
fetch next from @cur into @x
while (@@FETCH_STATUS = 0)
begin
print @x
fetch next from @cur into @x
END
close @cur
deallocate @cur
----将存储过程返回的列值再重新插入源表中
insert into #tmp(coly) EXEC sp_d
select * from #tmp
end
GO
EXEC sp_e
drop proc sp_c
drop proc sp_d
drop proc sp_e
drop table #tmp
